scripts/dtc/dtc.c

   1 /*
   2  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  18  *                                                                   USA
  19  */
  20
  21 #include <sys/stat.h>
  22
  23 #include "dtc.h"
  24 #include "srcpos.h"
  25
  26 /*
  27  * Command line options
  28  */
  29 int quiet;              /* Level of quietness */
  30 int reservenum;         /* Number of memory reservation slots */
  31 int minsize;            /* Minimum blob size */
  32 int padsize;            /* Additional padding to blob */
  33 int alignsize;          /* Additional padding to blob accroding to the alignsize */
  34 int phandle_format = PHANDLE_EPAPR;     /* Use linux,phandle or phandle properties */
  35 int generate_symbols;   /* enable symbols & fixup support */
  36 int generate_fixups;            /* suppress generation of fixups on symbol support */
  37 int auto_label_aliases;         /* auto generate labels -> aliases */
  38 int annotate;           /* Level of annotation: 1 for input source location
  39                            >1 for full input source location. */
  40
  41 static int is_power_of_2(int x)
  42 {
  43         return (x > 0) && ((x & (x - 1)) == 0);
  44 }
  45
  46 static void fill_fullpaths(struct node *tree, const char *prefix)
  47 {
  48         struct node *child;
  49         const char *unit;
  50
  51         tree->fullpath = join_path(prefix, tree->name);
  52
  53         unit = strchr(tree->name, '@');
  54         if (unit)
  55                 tree->basenamelen = unit - tree->name;
  56         else
  57                 tree->basenamelen = strlen(tree->name);
  58
  59         for_each_child(tree, child)
  60                 fill_fullpaths(child, tree->fullpath);
  61 }
  62
  63 /* Usage related data. */
  64 static const char usage_synopsis[] = "dtc [options] <input file>";
  65 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@AThv";
  66 static struct option const usage_long_opts[] = {
  67         {"quiet",            no_argument, NULL, 'q'},
  68         {"in-format",         a_argument, NULL, 'I'},
  69         {"out",               a_argument, NULL, 'o'},
  70         {"out-format",        a_argument, NULL, 'O'},
  71         {"out-version",       a_argument, NULL, 'V'},
  72         {"out-dependency",    a_argument, NULL, 'd'},
  73         {"reserve",           a_argument, NULL, 'R'},
  74         {"space",             a_argument, NULL, 'S'},
  75         {"pad",               a_argument, NULL, 'p'},
  76         {"align",             a_argument, NULL, 'a'},
  77         {"boot-cpu",          a_argument, NULL, 'b'},
  78         {"force",            no_argument, NULL, 'f'},
  79         {"include",           a_argument, NULL, 'i'},
  80         {"sort",             no_argument, NULL, 's'},
  81         {"phandle",           a_argument, NULL, 'H'},
  82         {"warning",           a_argument, NULL, 'W'},
  83         {"error",             a_argument, NULL, 'E'},
  84         {"symbols",          no_argument, NULL, '@'},
  85         {"auto-alias",       no_argument, NULL, 'A'},
  86         {"annotate",         no_argument, NULL, 'T'},
  87         {"help",             no_argument, NULL, 'h'},
  88         {"version",          no_argument, NULL, 'v'},
  89         {NULL,               no_argument, NULL, 0x0},
  90 };
  91 static const char * const usage_opts_help[] = {
  92         "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
  93         "\n\tInput formats are:\n"
  94          "\t\tdts - device tree source text\n"
  95          "\t\tdtb - device tree blob\n"
  96          "\t\tfs  - /proc/device-tree style directory",
  97         "\n\tOutput file",
  98         "\n\tOutput formats are:\n"
  99          "\t\tdts - device tree source text\n"
 100          "\t\tdtb - device tree blob\n"
 101 #ifndef NO_YAML
 102          "\t\tyaml - device tree encoded as YAML\n"
 103 #endif
 104          "\t\tasm - assembler source",
 105         "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
 106         "\n\tOutput dependency file",
 107         "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
 108         "\n\tMake the blob at least <bytes> long (extra space)",
 109         "\n\tAdd padding to the blob of <bytes> long (extra space)",
 110         "\n\tMake the blob align to the <bytes> (extra space)",
 111         "\n\tSet the physical boot cpu",
 112         "\n\tTry to produce output even if the input tree has errors",
 113         "\n\tAdd a path to search for include files",
 114         "\n\tSort nodes and properties before outputting (useful for comparing trees)",
 115         "\n\tValid phandle formats are:\n"
 116          "\t\tlegacy - \"linux,phandle\" properties only\n"
 117          "\t\tepapr  - \"phandle\" properties only\n"
 118          "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
 119         "\n\tEnable/disable warnings (prefix with \"no-\")",
 120         "\n\tEnable/disable errors (prefix with \"no-\")",
 121         "\n\tEnable generation of symbols",
 122         "\n\tEnable auto-alias of labels",
 123         "\n\tAnnotate output .dts with input source file and line (-T -T for more details)",
 124         "\n\tPrint this help and exit",
 125         "\n\tPrint version and exit",
 126         NULL,
 127 };
 128
 129 static const char *guess_type_by_name(const char *fname, const char *fallback)
 130 {
 131         const char *s;
 132
 133         s = strrchr(fname, '.');
 134         if (s == NULL)
 135                 return fallback;
 136         if (!strcasecmp(s, ".dts"))
 137                 return "dts";
 138         if (!strcasecmp(s, ".yaml"))
 139                 return "yaml";
 140         if (!strcasecmp(s, ".dtb"))
 141                 return "dtb";
 142         return fallback;
 143 }
 144
 145 static const char *guess_input_format(const char *fname, const char *fallback)
 146 {
 147         struct stat statbuf;
 148         fdt32_t magic;
 149         FILE *f;
 150
 151         if (stat(fname, &statbuf) != 0)
 152                 return fallback;
 153
 154         if (S_ISDIR(statbuf.st_mode))
 155                 return "fs";
 156
 157         if (!S_ISREG(statbuf.st_mode))
 158                 return fallback;
 159
 160         f = fopen(fname, "r");
 161         if (f == NULL)
 162                 return fallback;
 163         if (fread(&magic, 4, 1, f) != 1) {
 164                 fclose(f);
 165                 return fallback;
 166         }
 167         fclose(f);
 168
 169         if (fdt32_to_cpu(magic) == FDT_MAGIC)
 170                 return "dtb";
 171
 172         return guess_type_by_name(fname, fallback);
 173 }
 174
 175 int main(int argc, char *argv[])
 176 {
 177         struct dt_info *dti;
 178         const char *inform = NULL;
 179         const char *outform = NULL;
 180         const char *outname = "-";
 181         const char *depname = NULL;
 182         bool force = false, sort = false;
 183         const char *arg;
 184         int opt;
 185         FILE *outf = NULL;
 186         int outversion = DEFAULT_FDT_VERSION;
 187         long long cmdline_boot_cpuid = -1;
 188
 189         quiet      = 0;
 190         reservenum = 0;
 191         minsize    = 0;
 192         padsize    = 0;
 193         alignsize  = 0;
 194
 195         while ((opt = util_getopt_long()) != EOF) {
 196                 switch (opt) {
 197                 case 'I':
 198                         inform = optarg;
 199                         break;
 200                 case 'O':
 201                         outform = optarg;
 202                         break;
 203                 case 'o':
 204                         outname = optarg;
 205                         break;
 206                 case 'V':
 207                         outversion = strtol(optarg, NULL, 0);
 208                         break;
 209                 case 'd':
 210                         depname = optarg;
 211                         break;
 212                 case 'R':
 213                         reservenum = strtol(optarg, NULL, 0);
 214                         break;
 215                 case 'S':
 216                         minsize = strtol(optarg, NULL, 0);
 217                         break;
 218                 case 'p':
 219                         padsize = strtol(optarg, NULL, 0);
 220                         break;
 221                 case 'a':
 222                         alignsize = strtol(optarg, NULL, 0);
 223                         if (!is_power_of_2(alignsize))
 224                                 die("Invalid argument \"%d\" to -a option\n",
 225                                     alignsize);
 226                         break;
 227                 case 'f':
 228                         force = true;
 229                         break;
 230                 case 'q':
 231                         quiet++;
 232                         break;
 233                 case 'b':
 234                         cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
 235                         break;
 236                 case 'i':
 237                         srcfile_add_search_path(optarg);
 238                         break;
 239                 case 'v':
 240                         util_version();
 241                 case 'H':
 242                         if (streq(optarg, "legacy"))
 243                                 phandle_format = PHANDLE_LEGACY;
 244                         else if (streq(optarg, "epapr"))
 245                                 phandle_format = PHANDLE_EPAPR;
 246                         else if (streq(optarg, "both"))
 247                                 phandle_format = PHANDLE_BOTH;
 248                         else
 249                                 die("Invalid argument \"%s\" to -H option\n",
 250                                     optarg);
 251                         break;
 252
 253                 case 's':
 254                         sort = true;
 255                         break;
 256
 257                 case 'W':
 258                         parse_checks_option(true, false, optarg);
 259                         break;
 260
 261                 case 'E':
 262                         parse_checks_option(false, true, optarg);
 263                         break;
 264
 265                 case '@':
 266                         generate_symbols = 1;
 267                         break;
 268                 case 'A':
 269                         auto_label_aliases = 1;
 270                         break;
 271                 case 'T':
 272                         annotate++;
 273                         break;
 274
 275                 case 'h':
 276                         usage(NULL);
 277                 default:
 278                         usage("unknown option");
 279                 }
 280         }
 281
 282         if (argc > (optind+1))
 283                 usage("missing files");
 284         else if (argc < (optind+1))
 285                 arg = "-";
 286         else
 287                 arg = argv[optind];
 288
 289         /* minsize and padsize are mutually exclusive */
 290         if (minsize && padsize)
 291                 die("Can't set both -p and -S\n");
 292
 293         if (depname) {
 294                 depfile = fopen(depname, "w");
 295                 if (!depfile)
 296                         die("Couldn't open dependency file %s: %s\n", depname,
 297                             strerror(errno));
 298                 fprintf(depfile, "%s:", outname);
 299         }
 300
 301         if (inform == NULL)
 302                 inform = guess_input_format(arg, "dts");
 303         if (outform == NULL) {
 304                 outform = guess_type_by_name(outname, NULL);
 305                 if (outform == NULL) {
 306                         if (streq(inform, "dts"))
 307                                 outform = "dtb";
 308                         else
 309                                 outform = "dts";
 310                 }
 311         }
 312         if (annotate && (!streq(inform, "dts") || !streq(outform, "dts")))
 313                 die("--annotate requires -I dts -O dts\n");
 314         if (streq(inform, "dts"))
 315                 dti = dt_from_source(arg);
 316         else if (streq(inform, "fs"))
 317                 dti = dt_from_fs(arg);
 318         else if(streq(inform, "dtb"))
 319                 dti = dt_from_blob(arg);
 320         else
 321                 die("Unknown input format \"%s\"\n", inform);
 322
 323         dti->outname = outname;
 324
 325         if (depfile) {
 326                 fputc('\n', depfile);
 327                 fclose(depfile);
 328         }
 329
 330         if (cmdline_boot_cpuid != -1)
 331                 dti->boot_cpuid_phys = cmdline_boot_cpuid;
 332
 333         fill_fullpaths(dti->dt, "");
 334
 335         /* on a plugin, generate by default */
 336         if (dti->dtsflags & DTSF_PLUGIN) {
 337                 generate_fixups = 1;
 338         }
 339
 340         process_checks(force, dti);
 341
 342         if (auto_label_aliases)
 343                 generate_label_tree(dti, "aliases", false);
 344
 345         if (generate_symbols)
 346                 generate_label_tree(dti, "__symbols__", true);
 347
 348         if (generate_fixups) {
 349                 generate_fixups_tree(dti, "__fixups__");
 350                 generate_local_fixups_tree(dti, "__local_fixups__");
 351         }
 352
 353         if (sort)
 354                 sort_tree(dti);
 355
 356         if (streq(outname, "-")) {
 357                 outf = stdout;
 358         } else {
 359                 outf = fopen(outname, "wb");
 360                 if (! outf)
 361                         die("Couldn't open output file %s: %s\n",
 362                             outname, strerror(errno));
 363         }
 364
 365         if (streq(outform, "dts")) {
 366                 dt_to_source(outf, dti);
 367 #ifndef NO_YAML
 368         } else if (streq(outform, "yaml")) {
 369                 if (!streq(inform, "dts"))
 370                         die("YAML output format requires dts input format\n");
 371                 dt_to_yaml(outf, dti);
 372 #endif
 373         } else if (streq(outform, "dtb")) {
 374                 dt_to_blob(outf, dti, outversion);
 375         } else if (streq(outform, "asm")) {
 376                 dt_to_asm(outf, dti, outversion);
 377         } else if (streq(outform, "null")) {
 378                 /* do nothing */
 379         } else {
 380                 die("Unknown output format \"%s\"\n", outform);
 381         }
 382
 383         exit(0);
 384 }